by $18.90 This ”Follower Kit” is for use in STI (1st gen mag, 9×19), with spacer plate installed. This kit is designed for a mag OAL that measure up to 171mm long and includes a ”Grams Format” follower (S92) & (13) coil spring. SKU: FKS9-13 Categories: Follower Kits, STI/SV/SPS/CR Follower Kits Related products FKCL-13 $18.90 FKCP-13 $18.90 FKCP-11 $18.90 FKC-11 $18.90